I need serious help with tea length wedding dresses, brides!

I’m in the Birmingham, AL area and I have a budget of about $500-600. Since I’m getting married in NOLA, my dream dress is a tea-length, lacy, affordable, vintage-modern deal with sleeves. I do love ivory, champagne, and other off-white colors. Is it that impossible to find?! I’m extremely open to websites as well, but I know in this sites infinite knowledge and wisdom, you wonderful fabulous creatures can help me. Thanks so much!